bartlett



' (No Model.)v

M 2 Sheets- Sheet 1*.- W. A. BARTLETTlv PNEUMATIG CANNON.

Patented Mar. 4, 1884.

MN a MM S S M f] m@ N. PETER Pwvumognpw. minimun. Djc.

(No Model.) 2 Sheets-Sheet 2.

W. BARTLE-TT.

PNBUMATIC GANNN. No. 294,353. aPatented Mar 4, 1884.

N. FEIVERS. Phnwulhagnpn washinghm D. C.

v UNITED STATES PATENT "OFFICE,

WALLACE BARTLETT, OF VASHING'ION, DISTRICT OF COLUMBIA.

PN EUMATIC CANNON.

SPECIFICATION forming part of Letters vPatent No. 294,353, dated March 4, 1884.

Application filed January 8, 1584. (No model.)

` ing had'therein to the accompanying drawings.

This invention relates to pneumatic cannon, or similar guns in which the projectile is driven by the pressure of air or gas from a source of supply outside the bore of the gun.

The invention consists in the mechanism by which air or gas is conveyed from the flask to the bore of the gun; also, in mechanism by which the flask is moved with relation to its pivot.

The object of the .invention is to produce a gun from which dynamite projectiles may be thrown without danger of bursting in' the gun. In the drawings, Figure 61 is a side elevation of a gun, 16, mounted on a carriage and having a curved telescopic supply-pipe, 4". Fig. 62 is a cross-section of a portion of the supplypipe. Fig. 68 is an elevation of a portion of the breech and supply-pipe, the reverse of Fig. 61. Fig. 64 is an elevation showing a modiiied form of supply-pipe. Fig. 65 is a rear elevation of the same. Fig. 66 is an elevation and section of a further modification of the supply-pipe. Fig. 67 is a section of the same. Fig.68 is a further modiiication thereof, shown in section. Fig. 69 is a plan, partly in vsection, of mechanism for moving the flask. Fig. 70 is a detail thereof.

In Fig. 61 the gun barrel or tube l6 is trunnioned in a standard on flask 3 in 'such manner as to have a compensatory movement for expansion or contraction. The supply-pipeei.6 is curved and communicates with the supplyflask 36. One side ofthe curved pipe, or it may be a section, is made to telescope into another portion, so that the passage-way to the guntube a may be raised or lowered. The curve of the pipe is determined by the distance of the trunnions from the connection with thegun-tube at ai.

By reason of the telescopic arrangement of the supply-pipe, the gun may be trained vertically without interrupting the telescopic con- 5o nection to the iiask. A projection7 116, may be made below the ask, to give a greater range of movement.

The lazy-tongs arrangement of the supplyppe shown in' Figs. 64 and 65 is a modification of the above.

two sections, c, which is swiveled onA the breech of the gun, and di, which is swiveled to the iask, the two being swiveled together at e6. 'Ihe breech-closing mechanism, of any ordinary construction, closes a passage through the upper section,c', in line withthe breech ofthe gun.

Figs. 66 and 67 show another form of telescopic supply-pipe 46. In this case the pipe communicates with the gun-tube through the aperture a6 near the breech. rIhe gun is per-v mitted to have a longitudinal movement with reference tothe trunnion-supports. The upper section of vpipe c telescopes into-f6,which communicates with the iiask. The upward pressure of gas on shoulders y" h6 may be utilized for raising the breech of the gun.

In Fig. 68 the sections of the telescopic'pipe are j ointed together by ball-and-socket j oints t6.

The4 flask 3 may or may not form the carriage or support for the gun. In each case the admission of gas to the gun from the flask is to be controlled by suitable valves, as shown in other applications iiled of even date herewith, to which reference is made. y

I have shown and described mechanism by which the gun may be trained vertically by the pressure of the gas in the flask, in this and other applications'before referred to. For traversing the gun by the same power, I apply a cylinder, 7c, to the ilask 3, a little way from the point r, at which said iiask is pivoted. This cylinder has a pivotal motion around the tube, by which air is admitted thereto, as at o6. A lever, p, serves to operate slide-valve QG, which controls the admission of air to the cylinder. The cylinder k has a piston, s, which Vhas a rod projecting at each end of the cylinder, as at m6 m6. This rod has cross-heads m6, which can slide in ways n, so that as the cylinder is compelled to move either way with reference to the piston the piston-rod may slide in the ways ns and compensate for the circular movement of the carriage.-

It will be understood that all unnecessary details have been omitted from the drawings,

The tube 46 is made up of 55 IOT) Y ing the two, substantially as described.

3. The eombination,witha gun-tube mounted as described, so as to be free to move lengthwise, of a gas-Hash and a telescopic supplypipe connecting the two, substantially as stated.

4. The combination, with a gas-flask and gun-tube mounted thereon, of a telescopic supply-pipe connecting,` the two, said pipe being provided with a bearing-surface, by means of which the gas-pressure may be utilized to raise the breech ofthe gun.

5. The combination, with the gas-flask and the gun, mounted thereon, and a pipe connecting the flask with the gun-tube, of mechanism, substantially as described, whereby the guspressure in the flask may be utilized to traverse the gun.

6. The combination, with a gas-flask and gun mounted thereon, of a telescopic supplypipe connecting the two, and a projection from the gas-ask into which a portion of said telescopic tube may enter.

In testimony whereof I aiix my signature in presence 0f two witnesses.

VALLAGE A. BARTLETT.

Vitnesses:

PHILIP HAWLEY, C. W. BROWN. 

